Turntable with gerotor
a technology of turning tables and gerotors, applied in the direction of machines/engines, furniture parts, liquid fuel engines, etc., can solve the problems of noisy ball casters and suspect durability, and achieve the effect of convenient access to items
Inactive Publication Date: 2006-11-21
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AI Technical Summary
Benefits of technology
"The invention is a guide mechanism for a Reuleaux triangle shaped object, such as a turntable, that can turn smoothly within a square area. The mechanism includes a base and a gerotor attached to the object, with the base having a interior rotation profile with quadrilaterally symmetrical recesses and the gerotor having an exterior rotation profile with trilaterally symmetrical lobes. The shapes of the base and gerotor are derived from a hypocycloid function. The mechanism uses a 4:3 hypocycloid rotation and a gerotor guide bearing in a hypocycloid relationship to ensure smooth turning. The invention is efficient in using space and can be used in various applications such as a turntable or a storage unit."
Problems solved by technology
The ball casters were noisy and their durability was suspect.
Method used
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Embodiment Construction
[0020]Referring to FIG. 1, an outline of a corner comprises walls 1 and 2. A gerotor guide 3 is placed on surface 4 of the corner. Surface 4 together with walls 1 and 2 could be a kitchen countertop, the floor or a shelf of a corner cabinet, or any other corner environment. Gerotor guide 3 may be a square, substantially flat element having a back 5, sides 6 and 7, a front 8, and center A. The principle feature of gerotor guide 3 is as a housing accommodating hollowed-out area 9. Hollowed-out area 9 is shaped to have a profile 10 preferably substantially as shown, which will be explained further below. Hollowed-out area 9 may be to a partial depth in gerotor guide 3 or entirely removed. If area 9 is hollowed out to a depth which leaves a surface in gerotor guide 3, the surface may be substantially planar and possibly low friction. If area 9 is entirely removed from gerotor guide 3, the gerotor guide 3 may be placed on a surface which is substantially planar and possibly having a low ...
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A gerotor mechanism is used to guide the rotation of a turntable having a Reuleaux triangle shape. The mechanism includes a gerotor having three lobes; the gerotor guide has a guide profile including four recesses for receiving the lobes of the gerotor. Rotation is governed by a 4:3 hypocycloid function. The profiles of the gerotor and the gerotor guide are expanded uniformly from an original hypocycloid pattern so that rotation of the turntable results in execution of the hypocycloid function while retaining the gerotor in controlled contact with the profile of the gerotor guide. Substantially planar bearing surfaces may be used at the interface of (a) the turntable and the gerotor guide, (b) the gerotor and the gerotor guide, or (c) the gerotor and the underlying support surface. The gerotor guide may be part of a cabinet or built into a kitchen countertop.
Description
TECHNICAL FIELD[0001]This invention relates to turntables, rotatable shelves, and lazy susans, particularly for corner cabinets and the back corners of kitchen countertops. The invention is an eccentric rotation and bearing system for a Reuleaux triangle shaped turntable.BACKGROUND OF THE INVENTION[0002]This invention is an improvement on Krayer U.S. Pat. No. 5,152,592, which discloses the use of a 4:3 hypocycloid rotation guide for rotating a shelf in the shape of a Reuleaux triangle. FIGS. 5A to 5H of the '592 patent illustrate that the rotation of a Reuleaux triangle-shaped shelf in a square area can be adapted to the floor or shelf of a corner cabinet such as a standard corner kitchen cabinet in a generally square shape. During the rotation, the shelf contacts all four sides of the square area at all times, the apexes of the Reuleaux triangle describing the substantially square area as they rotate, and results in alternate recessed and projecting modes when used in a corner cabi...
Claims
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IPC IPC(8): F01C21/10F03C2/00F01C1/02F04C18/00
CPCA47B11/00A47B81/002A47F5/02A47B49/006
Inventor KRAYER, WILLIAM L.
Owner TURN THE CORNER